Low divergence single-mode surface-emitting concentric-circular-grating terahertz quantum cascade lasers

We report the design, fabrication and experimental characterization of surface-emitting terahertz (THz) frequency quantum cascade lasers (QCLs) with distributed feedback concentric-circular-gratings. Single-mode operation is achieved at 3.73 THz with a side-mode suppression ratio as high as ~30 dB....

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Bibliographic Details
Main Authors: Liang, Guozhen, Liang, Houkun, Zhang, Ying, Li, Lianhe, Davies, A. Giles, Linfield, Edmund, Yu, Siu Fung, Liu, Hui Chun, Wang, Qi Jie
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2014
Subjects:
Online Access:https://hdl.handle.net/10356/101635
http://hdl.handle.net/10220/18734
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Institution: Nanyang Technological University
Language: English